Assiornob to  holland stjenace



O. P. NYSTROM FURNACE GRATE SHAKER may 29, 1923. 1,456,707

Filed Feb. 10 1921 5 I g '1 I I a I 1 p I I I I I INVEN'TQTOscar-Pblgsfmm.

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i atentetl May 2%, H323 nniran than? oi ricam OSCAR 1. NYSTBOIE, OFHOLLAND, TLTICHIGAN, ASSIGNOB TO HOLLAND FURNACE COMPANY, 01 HOLLAND,MECHIGAN,

A. CORPORATION OF MICHIGAN.

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Application filed February 10, 1921. Serial No. 443,770.

To all whom it may concern Be it known that 1, Oscar. P Nrs'rnori, acitizen of the Unitedv States of America, 'residing at Holland, in thecounty of Ottawa. and State of Michigan, hav invented certain new anduseful Improvements in Furnace-Grate Shakers; and I do hereby declarethe following to be a full clear, andexact description of the invention,such as will en able others skilled in the art to which it appertains tomake and use the same.

This invention relates to improvements in furnace grate shakers and moreparticularly to means for shaking such grates as have an oscillatory ora reciprocatory move ment and its object is to provide a shaking leveradapted to be located outside the furnace and easily accessible formanual operation which may be easily attached to the furnace grate ordetached therefrom and which has its fulcrum firmly attached to a baseindependent of any part of the furnace proper. The device is alsoprovided with various other new and useful. features as will more fullyappear as a clear understanding of the invention is had from thefollowing description taken in connection with the accompanying drawingsin which:

Figure 1 is a front elevation of a furnace with a rate shaker embodyingthis invention appied thereto Fig. 2 is an enlarged sectional plan ofthe same on the line 22 of Fig. 1,

Fig. 3 is a sectional elevation on the line 3-3 of Fig. 2 and r Fig. 4cis an enlarged section of a portion of the furnace casting showing adetail of construction.

Like reference characters refer to like parts in all of the figures.

1 represents the furnace casing, usually made of sheet metal andattached by bolts or like means to the front castings 2-2 Hinged to thelower one of said front castings 2 is the ash-pit door 2% said castinghaving an outwardly extending rim 2 surroundlng the door opening and thedoor 3 closes against said rim. The ash-pit 5 is directly behind theash-pit door and is surmounted by the fire-pot (not shown) and a rate 6is mounted beneath the fire-pot in t e usual way. In the constructionshown the grate is pivotally supported at its center and has a lever 7extending within the ashpit- 5 toward the ash-pit door 3 andterminatouter end by a hook 8 pivotally suspended from the top of theash-pit casting. The Y grate. being supported in this way is permitted alimited oscillatory movement by means of the lever 7 which may beactuated through the draft opening by raising the draft door l or bymeans of the shaking lever as hereafter ClGSCIlbQI.

A shaking lever'9 is located outside the furnace adjacent to and at oneside of the ash-pit door, its lower end acting as the fulcrum and beingpivotally attached to a pivot block 10 which is firmly fixed to thefloor or foundation upon which the furnace is mounted. The pivot blorkshown in the drawing isformed with a downwardly extending lug 10 whichis imbedded in the cement Or other material of which the furnacefoundation is made but other forms of pivot blocks may be used which maybe attached to the foundation in other ways such as being provided witha base adapted to be screwed to a floor or other means of attaching. Aconnecting rod 11 has one of its ends pivotally attached to the shakinglever 9 between the ends of said lever and this rod extends through anaperture 12 in the rim 2* of the front casting 2 and its inner end isformed into a hook which embraces the grate lever 7. The upper end ofthe shaking lever 9 acts as a handle and is preferably curved androunded as shown to afford a more convenient grip and bymanuallyoscillating this lever the furnace grate will likewise beoscillated. Although an oscillating grate having a peculiar mode ofsuspension has been shown and described it is obvious that any gratehaving either an oscillatory or reciprocatory motion may be manipulatedby this form of shaking lever and connecting rod.

A great advantage is had by attaching the )ivot block directly to thefurnace foundation instead of to the furnace itself. If the lever wereattached to the furnace by extending a bracket from the front casting 2thereof or by bolting a. bracket to the casing 1, to either of which thelever would be connected, the vibration and strain would soon breakthecasting or tear the bracket loose from the casing which is invariablymade of sheet metal and not suficiently strong to withstand such strain.By fixing the pivot mayhe knooked out to for n the aperture, if itas,desired or left intact if the shaking .to shake block directly yto thefoundation it may he fastened as securely as necessary to Withstand anystrain that may be put upon it.

The,hooked; end of ithe connecting rod 11 provides a convenient means of{attaching the rod to the grate lever and also enables it to be readilydisconnected if it-is desired the grate Without using the shalzinglever. a

Asall furnaee users do not desire the shak ing ,lever applied to thefurnaceathe front casting 2? may rb 'niade with the aperture 12 closedbyta thin Wall of metal 12 Which extended front casting andgreeiprocable in means [for connecting the lever between its ends, tosaid arm. i

2. The combination Witha furnace having a movable grate a front castinghaving an-extended portion with a door opening therein, and an arm onthe grate extending into said extended portion of the front casting of agrate shaker comprising a, pivot block fastened to the furnacefoundation separate from the furnace and atone side of said frontcasting extension, a lever piv-v otedat its lower end to saidpivothlookand adapted to oscillate inaplane parallel With; I said dooropening, and a rod .pivotal'lyljat' a plane parallel with said dooropening and tached atone end tosaid lever intermediate,

its ends and extending through an opening in said front, castingextension and provided'i armon the grate. In testimony'whereof I aflixsignature;

at its other endwith a hook toemlorace the oso ne-r; N srRo' ;v j

